AUTO-CLEANING: With automatic filter cleaning, the Bosch VAC140AH dust extractor cleans the filter every 15 seconds to help maintain maximum suction power. PERFORMANCE: The included HEPA filter caputres 99.97% of particles at 0.3 microns or larger while the included fleece filter bag helps to protect the filter and provides the optimal containment of dry dust and debris OSHA COMPLIANT: Featuring Bosch PRO+GUARD, an end-to-end dust collection system to help users move toward OSHA Silica Table 1 dust compliance. POWER: With strong airflow and suction power, the Bosch VAC140AH dust extractor delivers a maximum 150-cubic-feet-of-air-per-minute rate (CFM), with a sustainable maximum 97 in. static water lift COMPATIBLE: With power tool activations users can utilize power tool's switch to turn vacuum on and off. The Power Broker dial will match the suction force to application.